Past and Future of CG J1720-67.8: Constraints from Observations and Models

Details Past and Future of CG J1720-67.8: Constraints from Observations and Models Past and Future of CG J1720-67.8: Constraints from Observations and Models

2006-03-19

arxiv.org/abs/astro-ph/0603508v1

Astronomy and Astrophysics

Astrophysics

5 pages, 3 (degraded) figures. Proc. ESO Workshop "Groups of galaxies in the nearby Universe", Santiago, Chile, 5-9 Dec. 2005,

Scientific paper

We discuss the evolution of the peculiar, nearby (z = 0.045), compact galaxy group CG J1720-67.8, by interpreting a large amount of observational information on the basis of our recent results from spectrophotometric evolutionary synthesis models and new N-body/SPH simulations. The group, that is composed of two spiral galaxies with a mass ratio approximately 4:1 and an S0 galaxy in a particularly compact configuration, is undergoing an active pre-merging phase. Several tidal features are signposts of the complex dynamics of the system. We suggest that the observed structure of the tidal features can be explained only if all three galaxies are involved in a strong interaction process.

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